Is this argument valid and sound? Logics?

[.....]

1.Logging onto any type of social network wastes time
2.Time wasted on a social networks distorts your priorities and makes you unproductive
3.Social Networking lowers your productivity (From 1&2)
4.When you create a Facebook account it requires a lot of personal information
5.You’re personal information can be easily accessible to anyone, anywhere
6.Social Networking compromises your privacy (From 3&4)
7.We should strive to only do things that benefit us
8.Social networking negatively affects your life
9.Social Networking is not beneficial for us (From 7&8)
10.Therefore, we shouldn’t be using social networking sites(From 1-9)


Does it make sense? I wrote it myself, Its' not an test question I need the answer for, I just want feedback.